Sash-cord guide



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(ModeL) D. H 'DUER. Sash 00rd Guides. No. 230,408. Patented July 27, I880.

N-PETERS. PHOTO-LITNOGHAPM WASH NG'ION D C UNITED STATES PATENT OFFICE.

DOUGLAS H. DUER, OF BALTIMORE, MARYLAND.

SASH-CORD GUIDE.

SPECIFICATION forming part of Letters Patent No. 230,408, dated July 27, 1880.

Application filed April 14, 1880.

To all whom it may concern:

Be it known that I, DOUGLAS H. DUER, of Baltimore city, State of Maryland, have invented certain new and useful Improvements in Sash-(lord Guides; and I hereby declare the same to be fully, clearly, and exactly described as follows, reference being'had to the accompanying drawings, in which-- Figure l is a side elevation of the device inserted in the peculiar mortise adapted for its reception. Fig. 2 is arear elevation of the device.

My intention has reference to sash-cord guides or sash-pulleys, and it has for its object to so construct the casing which carries the sheave as to afford the greatest facility for inserting the guide in the Window-frame, adapting the shape of the sheave to a moriise of predetermined and peculiar construction. The said mortiseis cut by means ofa la'- erally-movingbit long enough to completely perforate the wiiniow-frame, and having a shoulder or spur at the proper distance from its point to countersink a groove for the reception of the face-flange of the sash cord guide.

In the accompanying drawings, A is the casing, having rounded ends b I) and a faceflange, a, of uniform width and extending completely around the guide, the ends a, being rounded, as shown. D is the sheave, mounted on a pivotpin, d. The bottom of the casing is provided with a spur, c, to engage with the bottom of the mortise, and the upper end of the casing is perforated, as shown at c, a barbed-wire nail,(),being driven through the hole.

it will be seen that the mortise may be formed by any of the well-known mortisingmachines, it being only necessary to provide the machine with the spurred laterally-cutting bit and present the window-frame to it, or vice versa, until the bit has perforated the frame and its spur has sunk to the depth of the flange a, a suitable stop being, of course, used to limit the motion. The frame is then simply moved at right angles to the bit until the mortise cut thereby is of the exact length of the casing A, when the frame is withdrawn, the mortise being completed. It is obvious that these motions may both be made by either bit or frame-carriage, or either by either.

To insert the casing in the mortise the lower end of the device is laid in place, with (ModeL) the spur resting against the bottom of the mortise, the face of the casing being slightly inclined to the face of the window-frame. A tap of a hammer on the top of the casing causes the spur to enter the wood, and admits of the casing being pressed into the mortise flush with the window-frame. then secured by a barbed-wire nail or screw, 0, inserted through the hole 6.

Instead of the spur c, a second nail may be inserted through the bottom of the device, or, in lieu of both, barbs may be formed on the sides or ends of the casing, the enteringmarks of which will be concealed by thefacvflange.

Now, from the foregoing description of the construction and mode of operation of the device it will be seen that its essential features are, first, a face-flange to prevent. it from entering themortise beyond the face of the window-frame; second, that this flange shallhave curved or. semicircular ends and be of uniform width all round; and, third, that the device he provided with means for securing it in the window-frame. The first two essentials are dependent upon the peculiar formation of the mortise as made in the manner and by the spurred bit described.

The device, when in place, has a neat and symmetrical appear-mice by reason of the even and uniform approximation of its central aperture to the edge all round and the concealment of the fastening devices.

What I claim is.

1. A sash-cord guide having a face-flange of uniform width all around and rounded at the ends, whereby the device is adapted for insertion in a mortise formed by a spurred laterally-cutting bit, as set forth.

2. A sash-cord guide having rounded ends provided with a spur and perforation, or their specified equivalents, and having a face-flange of uniform width around the casing, as set forth.

3. The sash-cord guide herein described, consisting of the sheave and easing, the latter having a face-flange ofuniform Width all around and rounded ends, one of which is provided with a spur and the other with a perforation in the rear of the flange, as set forth.

DOUGLAS H. DUER. Witnesses:

JOHN C. GITTING-ER B. D. WILLIAMS.

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